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Guides use Jeeps to explore the miles of mined caverns in Louisville Mega Cavern's 100-acre complex in the former underground limestone mine.
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It was all going to be perfectly safe, everyone assured us. The slender steel cables we'd be harnessed to were rated to carry 13 tons, and the 8-foot-long steel bolts anchoring them into the limestone walls could hold 5 tons.




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Scripps Interactive Newspapers Group
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